What is Car Coolant?

1 Answers
EthanMarie
07/29/25 10:45pm
Car coolant is a medium that protects the car engine. Here are the specific details about car coolant: 1. Function: Coolant, also known as antifreeze, has two main functions. One is to cool the engine during operation, preventing damage caused by overheating. The other is to prevent the car's cooling system from freezing in low winter temperatures, serving as an antifreeze. The freezing and boiling points of coolant are different from those of water, which is why it can perform these two opposite functions simultaneously. 2. Reason for Replacement: Coolant has a limited lifespan. Under high temperatures, certain components of the coolant react to form ethanol, which then combines with other components in the coolant to create harmless substances. However, once this reaction is complete, any additional ethanol generated cannot be eliminated. High levels of ethanol can damage metal components. Therefore, coolant should be replaced periodically to ensure the cooling system functions properly.
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